I downloaded AIM 3.1 from
http://www.oracle.com/partners/develop/implementat ion/global/aimfoundation.html a few weeks ago, and was able to unzip and
install. However, although the user interface had been tidied
up a bit, I was not at all impressed with the BR.100 document.
There is now just one, with no setup details for any individual
application. I queried this with Oracle. It turns out that you
are supposed to build your own BR.100 by referring to the
appropriate requirements document.

The download of Oracle AIm 3.1 needs a password from Oracle support to open the zip file. The preferred answer is to request from oracle the password , either through a Service Request or through the website itself